Abstract: Apparatus for imparting spiral motion to material flowing in a tube comprising a relatively short spiral member anchored to prevent movement relative to said tube, said spiral member having maximum length shorter than said tube, said spiral member capable of imparting spiral motion to the entire amount of material flowing in said tube.

Abstract: Apparatus for imparting spiral motion to material flowing in a tube comprising a relatively short spiral member anchored to prevent movement relative to the tube. The spiral member has a maximum length shorter than the tube and is capable of imparting spiral motion to the entire amount of material flowing in the tube.

Abstract: Plastics recovery, compounding and fabricating apparatus is disclosed utilizing a gear pump specially designed to include a media free space between the gear face and side walls with minimum sealing to improve volumetric pump efficiencies and provide pumping capacity insensitivity to viscosity over a wide range.

Abstract: Apparatus is disclosed for blending free-flowing granular materials comprising: an outer chamber having walls which converge toward and terminate in outlet means at the base thereof; substantially vertically-positioned fenestrated blending tube means spaced above said outlet means having a plurality of entrance means therein; solid, conveying tube means extending substantially vertically through and coaxial within said blending tube means and defining an annular space therebetween; an entrainment zone positioned between said base of said conveying tube means and the base portion of said chamber; and gas inlet means positioned in said chamber to discharge gas upwardly into and through said entrainment zone toward the base inlet of said conveying tube means; the distance of the point of gas inlet discharge into said entrainment zone from said base of said chamber is defined by the equation:X .ltoreq. L - r Tan .alpha.

Abstract: Plastics recovery and polyolefins compounding systems utilize a gear pump for the pumping function. The gear pump is specially designed to include a free media surrounding substantially the entire gear face with minimum sealing to improve volumetric pump efficiencies and provide pumping capacity insensitivity to viscosity over a wide range. A method of monitoring melt index and production rate for reactor control is also disclosed.